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Finding the Fourth Proportional to 6,487.15, 9,715.11 and 3,705.39

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Solution

The fourth proportional to 6,487.15, 9,715.11 and 3,705.39 is: 5,549.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,487.15 : 9,715.11 = 3,705.39 : x
  2. Step 2: Convert to fraction form
    6,487.15/9,715.11 = 3,705.39/x
  3. Step 3: Cross multiply
    6,487.15x = 9,715.11 × 3,705.39
  4. Step 4: Simplify right side
    6,487.15x = 35,998,271.44
  5. Step 5: Solve for x
    x = 35,998,271.44/6,487.15
  6. Step 6: Final answer
    x = 5,549.17

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.